Orbit Fit and Astrometric record for 307251

The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.

# Object: 307251    
# Created Mon Dec 18 02:36:41 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   66 observations of   67
# Arc:  12.99y
# First observation: 2002/05/17
#  Last observation: 2015/05/15
# Chi-squared of fit:   224.82 DOF:  126 RMS:  0.33
# Min/Max residuals:    -1.21    0.80
# Exact a, adot, b, bdot, g, gdot:
  1.508081E-05  2.722251E-02 -3.771942E-06 -4.636518E-03  2.595060E-02  3.657591E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.409081 -128.278244   -0.081247    0.024821   -1.012502  2452411.761343
# Heliocentric elements and errors
Epoch:              2452412.5000  =  2002/05/18
Mean Anomaly:           33.99176 +/-     0.000
Argument of Peri:      121.81452 +/-     0.000
Long of Asc Node:       59.82974 +/-     0.000
Inclination:             9.77872 +/-     0.000
Eccentricity:         0.20184428 +/-    0.0000
Semi-Major Axis:     46.56218592 +/-    0.0000
Time of Perihelion: 2441454.7962 +/-       0.0
Perihelion:          37.16387511 +/-    0.0000
Aphelion:            55.96049673 +/-    0.0000
Period (y)              317.7300 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -24.42712268 +/-    0.0000
Ecliptic Y          -31.08139968 +/-    0.0000
Ecliptic Z            0.94748061 +/-    0.0000
Ecliptic XDOT         0.00199997 +/-    0.0000
Ecliptic YDOT        -0.00209329 +/-    0.0000
Ecliptic ZDOT        -0.00047931 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.54274218 +/-    0.0000
Geocenter to KBO     38.53470123 +/-    0.0000
# Hcoef:  5.49

The following table shows the complete astrometric record for 307251. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (307251) followed by the observatory code and reference code for the source of the astrometry.

2002 05  17.26060  15 18 43.836  -16 50 03.26        307251    675  Cf9011      
2002 05  17.33257  15 18 43.456  -16 50 02.52        307251    675  Cf9011      
2002 05  17.39780  15 18 43.111  -16 50 00.59        307251    675  Cf9011      
2002 05  31.17405  15 17 34.08   -16 46 19.5   21.5R 307251    644  Cl2692      
2002 06  13.24701  15 16 34.156  -16 43 15.05  21.3R 307251    675  Cf9011      
2002 06  13.30038  15 16 33.951  -16 43 14.69        307251    675  Cf9011      
2002 06  13.36249  15 16 33.659  -16 43 13.58  21.5R 307251    675  Cf9011      
2002 06  14.30061  15 16 29.683  -16 43 01.80  21.2R 307251    675  Cf9011      
2002 06  16.22389  15 16 21.68   -16 42 38.5   21.5R 307251    644  Cl2692      
2002 06  25.21127  15 15 47.33   -16 41 01.4   21. R 307251    644  Cl2692      
2002 06  26.22997  15 15 43.85   -16 40 52.4   21.5R 307251    644  Cl2692      
2003 04  25.31162  15 26 36.19   -17 35 00.5   20.5R 307251    675  Ci1476      
2003 04  25.35647  15 26 35.98   -17 35 00.0   20.5R 307251    675  Ci1476      
2003 05  31.18714  15 23 34.85   -17 25 27.3   20.5R 307251    675  Ci1476      
2003 05  31.23053  15 23 34.64   -17 25 27.0   20.7R 307251    675  Ci1476      
2003 05  31.28280  15 23 34.36   -17 25 26.2   20.5R 307251    675  Ci1476      
2004 05  20.25174  15 30 26.56   -18 06 12.4   19.7R 307251    688  Ck8098      
2004 05  20.32591  15 30 26.16   -18 06 10.2         307251    688  Ck8098      
2004 05  26.18450  15 29 56.22   -18 04 40.3   20.7R 307251    304  Ck8672      
2004 05  26.21650  15 29 56.06   -18 04 39.8         307251    304  Ck8672      
2005 03  10.49434  15 41 02.79   -18 56 14.2         307251    G96  Cq1743      
2005 04  11.44605  15 39 34.82   -18 52 18.6         307251    G96  Cq1743      
2005 05  13.34219  15 37 04.19   -18 45 05.1         307251    G96  Cq1743      
2006 05  03.41979  15 43 56.61   -19 23 28.7   22.0R 307251    250  S~06AV      
2006 05  03.42418  15 43 56.58   -19 23 28.6         307251    250  S~06AV      
2006 05  03.42858  15 43 56.56   -19 23 28.6         307251    250  S~06AV      
2006 05  03.43298  15 43 56.54   -19 23 28.5         307251    250  S~06AV      
2009 06  23.23163  15 57 42.16   -20 55 04.1         307251    688  C~07bx      
2009 06  23.29375  15 57 41.87   -20 55 03.3         307251    688  C~07bx      
2009 09  16.01828  15 56 34.000  -20 54 25.35        307251    809  C~0FlN      
2009 09  16.02065  15 56 34.016  -20 54 25.32        307251    809  C~0FlN      
2009 09  16.02475  15 56 34.001  -20 54 25.77        307251    809  C~0FlN      
2009 09  16.02975  15 56 34.041  -20 54 25.80        307251    809  C~0FlN      
2009 09  16.03311  15 56 34.022  -20 54 25.97        307251    809  C~0FlN      
2009 09  17.00111  15 56 37.227  -20 54 36.95        307251    809  C~0FlN      
2009 09  17.00753  15 56 37.282  -20 54 37.04        307251    809  C~0FlN      
2009 09  17.04245  15 56 37.390  -20 54 37.24        307251    809  C~0FlN      
2009 09  18.00821  15 56 40.689  -20 54 48.65        307251    809  C~0FlN      
2009 09  19.01046  15 56 44.196  -20 55 00.55        307251    809  C~0FlN      
2009 09  19.01807  15 56 44.223  -20 55 00.56        307251    809  C~0FlN      
2009 09  19.02306  15 56 44.249  -20 55 00.79        307251    809  C~0FlN      
2011 06  07.40546  16 10 55.164  -22 01 19.30  21.3w 307251    F51  C~1vxB      
2011 06  07.41961  16 10 55.103  -22 01 19.22  21.4w 307251    F51  C~1vxB      
2011 06  07.43380  16 10 55.020  -22 01 18.96  21.3w 307251    F51  C~1vxB      
2013 06  12.37446  16 22 20.835  -22 59 20.63  21.7w 307251    F51  C~1vxB      
2013 06  12.38534  16 22 20.778  -22 59 20.63  21.7w 307251    F51  C~1vxB      
2013 06  12.39620  16 22 20.717  -22 59 20.37  21.6w 307251    F51  C~1vxB      
2013 06  12.40703  16 22 20.669  -22 59 20.76  21.9w 307251    F51  C~1vxB      
2014 05  03.48158  16 31 40.142  -23 32 36.79  21.8w 307251    F51  C~1vxB      
2014 05  03.49238  16 31 40.032  -23 32 36.57  21.9w 307251    F51  C~1vxC      
2014 05  03.50313  16 31 40.002  -23 32 36.64  21.6w 307251    F51  C~1vxC      
2014 05  21.44005  16 30 12.059  -23 30 29.54  21.6w 307251    F51  C~1vxC      
2014 05  21.45317  16 30 11.995  -23 30 29.46  21.6w 307251    F51  C~1vxC      
2014 05  21.46623  16 30 11.922  -23 30 29.10  21.7w 307251    F51  C~1vxC      
2014 05  21.47932  16 30 11.856  -23 30 29.06  21.6w 307251    F51  C~1vxC      
2014 05  28.43213  16 29 35.655  -23 29 30.89  21.6w 307251    F51  C~1vxC      
2014 05  28.44274  16 29 35.602  -23 29 30.83  21.5w 307251    F51  C~1vxC      
2014 05  28.45336  16 29 35.553  -23 29 30.76  21.4w 307251    F51  C~1vxC      
2014 05  28.46397  16 29 35.485  -23 29 30.66  21.8w 307251    F51  C~1vxC      
2014 06  18.38352  16 27 48.005  -23 26 22.80  21.0i 307251    F51  C~1vxC      
2014 06  18.39612  16 27 47.938  -23 26 23.07  21.0i 307251    F51  C~1vxC      
2014 06  18.40870  16 27 47.871  -23 26 22.68  20.8i 307251    F51  C~1vxC      
2014 06  18.42127  16 27 47.798  -23 26 22.66  21.2i 307251    F51  C~1vxC      
2015 05  15.48214  16 36 39.340  -23 57 46.18  21.9w 307251    F51  C~1vxC      
2015 05  15.49309  16 36 39.267  -23 57 46.26  22.3w 307251    F51  C~1vxC      
2015 05  15.50403  16 36 39.233  -23 57 46.16  22.2w 307251    F51  C~1vxC      
2015 05  15.51495  16 36 39.184  -23 57 46.09  21.8w 307251    F51  C~1vxC      

The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.

  1   0.0000      0.00    -0.21       0.00     0.28
  2   0.0002      0.00     0.35       0.00    -0.37
  3   0.0004      0.00     0.28       0.00     0.46
  4   0.0381      0.00     0.67       0.00    -0.36
  5   0.0739      0.00     0.20       0.00     0.21
  6   0.0740      0.00     0.60       0.00    -0.11
  7   0.0742      0.00     0.26       0.00     0.20
  8   0.0768      0.00     0.20       0.00     0.21
  9   0.0820      0.00    -0.03       0.00     0.05
 10   0.1066      0.00    -0.80       0.00     0.51
 11   0.1094      0.00     0.20       0.00     0.00
 12   0.9392      0.00    -0.39       0.00    -0.23
 13   0.9393      0.00    -0.25       0.00    -0.42
 14   1.0374      0.00    -0.27       0.00     0.33
 15   1.0376      0.00    -0.18       0.00    -0.01
 16   1.0377      0.00    -0.47       0.00     0.01
 17   2.0096      0.00     0.30       0.00    -1.21
 18   2.0098      0.00     0.11       0.00    -0.16
 19   2.0258      0.00    -0.23       0.00    -0.16
 20   2.0259      0.00    -0.17       0.00    -0.14
 21   2.8152      0.00    -0.75       0.00    -1.15
 22   2.9026      0.00 (  -3.71)      0.00 (   0.95)
 23   2.9900      0.00    -0.37       0.00     0.19
 24   3.9621      0.00     0.66       0.00     0.76
 25   3.9621      0.00     0.54       0.00     0.80
 26   3.9621      0.00     0.57       0.00     0.74
 27   3.9621      0.00     0.59       0.00     0.78
 28   7.1019      0.00     0.14       0.00    -0.18
 29   7.1021      0.00    -0.10       0.00    -0.03
 30   7.3340      0.00     0.16       0.00     0.03
 31   7.3340      0.00     0.28       0.00     0.09
 32   7.3341      0.00    -0.14       0.00    -0.32
 33   7.3341      0.00     0.22       0.00    -0.29
 34   7.3341      0.00    -0.23       0.00    -0.43
 35   7.3367      0.00    -0.40       0.00    -0.28
 36   7.3367      0.00     0.11       0.00    -0.30
 37   7.3368      0.00    -0.01       0.00    -0.10
 38   7.3395      0.00    -0.01       0.00    -0.15
 39   7.3422      0.00    -0.10       0.00    -0.01
 40   7.3423      0.00    -0.10       0.00     0.07
 41   7.3423      0.00     0.03       0.00    -0.10
 42   9.0572      0.00    -0.17       0.00     0.04
 43   9.0572      0.00     0.02       0.00    -0.04
 44   9.0573      0.00    -0.12       0.00     0.06
 45  11.0722      0.00     0.14       0.00     0.12
 46  11.0722      0.00     0.12       0.00     0.01
 47  11.0722      0.00     0.05       0.00     0.17
 48  11.0723      0.00     0.16       0.00    -0.33
 49  11.9623      0.00     0.26       0.00    -0.07
 50  11.9623      0.00    -0.63       0.00     0.08
 51  11.9623      0.00    -0.33       0.00    -0.05
 52  12.0114      0.00     0.06       0.00    -0.06
 53  12.0115      0.00     0.13       0.00    -0.09
 54  12.0115      0.00     0.06       0.00     0.17
 55  12.0116      0.00     0.10       0.00     0.10
 56  12.0306      0.00    -0.07       0.00     0.14
 57  12.0306      0.00    -0.02       0.00     0.11
 58  12.0306      0.00     0.10       0.00     0.09
 59  12.0307      0.00    -0.07       0.00     0.10
 60  12.0879      0.00     0.35       0.00     0.15
 61  12.0880      0.00     0.29       0.00    -0.23
 62  12.0880      0.00     0.23       0.00     0.04
 63  12.0881      0.00     0.08       0.00    -0.05
 64  12.9944      0.00     0.21       0.00     0.11
 65  12.9945      0.00    -0.05       0.00    -0.04
 66  12.9945      0.00     0.27       0.00    -0.01
 67  12.9945      0.00     0.37       0.00    -0.01

The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.

307251    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.352    46.352    46.352
ecceobj         0.197     0.197     0.197
incobj          9.788     9.788     9.788
qmin           36.480    36.520    36.514
qmax           57.448    57.484    57.484
amean          46.749    46.748    46.748
amin           46.325    46.325    46.320
amax           47.236    47.255    47.253
emean           0.202     0.202     0.202
emin            0.188     0.188     0.188
emax            0.217     0.217     0.217
imean           8.491     8.491     8.490
imin            7.738     7.738     7.738
imax            9.333     9.336     9.330
excite_mean     0.250     0.250     0.250
fracstop        1.000     1.000     1.000
cjmean          3.058     3.058     3.058

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
libcent 1      -180.0    -180.0    -180.0
libamp  1      -180.0    -180.0    -180.0
libcent 2      -180.0    -180.0    -180.0
libamp  2      -180.0    -180.0    -180.0
libcent 3      -180.0    -180.0    -180.0
libamp  3      -180.0    -180.0    -180.0
libcent 4      -180.0    -180.0    -180.0
libamp  4      -180.0    -180.0    -180.0

kozaimean       180.4     180.7     180.4
kozaiamp        180.0     180.0     180.0